De Historia Et Veritate Unicornis by Michael Green
A very fun read,but actually I'm re-reading it mostly cause I enjoy its inspiring illustrations.It's supposed to be a transcription of a Medieval manuscript —in Latin,of course— detailing some observations of the unicorn from a naturalistic point of view.It's very detailed and that helps a lot to get into the idea that maybe,some time ago,unicorns did exist as both real and magic animals.